Thermal Engineering MCQ with Answers

41) If the temperature of intake air in internal combustion engine increases, then its efficiency will

Answer is:

Decrease

42) The thermal efficiency of a petrol engine is ______ as compared to diesel engine.

Answer is:

Less

43) In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

Answer is:

Scavenging

Explanation:

The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crank case, is known as scavenging.

In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

44) In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

Answer is:

Both (A) and (B)

45) Supercharging is the process of supplying the intake air to the engine cylinder at a density ______ the density of the surrounding atmosphere.

Answer is:

41) If the temperature of intake air in internal combustion engine increases, then its efficiency will

Decrease

42) The thermal efficiency of a petrol engine is ______ as compared to diesel engine.

Less

43) In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

Scavenging

44) In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

Both (A) and (B)

45) Supercharging is the process of supplying the intake air to the engine cylinder at a density ______ the density of the surrounding atmosphere.

Greater than